P. Chera-aree, C. Chayachinda, S. Niyomnaitham, and W. Kamolvit, “Cefoxitin Plus Doxycycline Versus Clindamycin Plus Gentamicin in Hospitalized Pelvic Inflammatory Disease Patients: An Experience from A Tertiary Hospital”, Siriraj Med J, vol. 70, no. 6, pp. 479–483, Dec. 2018.